Fermi-surface change in Yb-doped CeCoIn5


Fermi-surface change in Yb-doped CeCoIn5

Polyakov, A.; Ignatchik, O.; Bergk, B.; Bianchi, A. D.; Blackburn, S.; Prevost, B.; Cote, M.; Seyfarth, G.; Hurt, D.; Fisk, Z.; Goodrich, R. G.; Richter, M.; Sheikin, I.; Wosnitza, J.

The evolution of the band-structure parameters of Ce1−xYbxCoIn5 was studied as a function of Yb doping by systematic de Haas–van Alphen (dHvA) measurements. We found only a small change of the dHvA frequencies and effective masses of CeCoIn5 for a low Yb concentrations (x =0.1). A drastic change of the Fermi surface appears for high dilution, i.e., for x ≥0.55. The experimentally observed Fermisurface topology of YbCoIn5 is in perfect agreement with the calculated band structure. For small x, the effective masses remain strongly renormalized, whereas for ≥0.55 the masses are reduced dramatically.

  • Poster
    Frühjahrstagung der DPG, 26.-29.03.2012, Berlin, Deutschland

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Publ.-Id: 16943